chkconfig
Manage the runlevel of services on CentOS 6. tldr-pages
On Linux 2 Sigma rules name it
Linux
List services with runlevel
chkconfig --listIdentifyShow a service's runlevel
chkconfig --list ntpdIdentifyEnable service at boot
chkconfig sshd onIdentifyEnable service at boot for runlevels 2, 3, 4, and 5
chkconfig --level 2345 sshd onIdentifyDisable service at boot
chkconfig ntpd offIdentifyDisable service at boot for runlevel 3
chkconfig --level 3 ntpd offIdentify